Abstract: A method for determining a probability that ingredient materials found at a scene will be used for producing a target material, the method comprising using at least one hardware processor for: receiving input related to at least one ingredient material found at a scene; determining an ingredient material score from the input, the ingredient material score indicating a probability that the at least one ingredient material is found at the scene; and determining a target material score associated with a target material, the score indicative of a probability that the at least one ingredient material is used for producing the target material, wherein the target material score relates to a ratio between a sum of the ingredient material score of materials required for producing the target material and detected at the scene, and a number of ingredient materials required for producing the target material.